Full-waterproof closed loudspeaker

Abstract

The invention relates to the technical field of loudspeakers, and discloses a full-waterproof closed loudspeaker, which comprises a loudspeaker unit, a dust collection unit and a sealing unit, wherein the loudspeaker unit comprises an outer shell, a permanent magnet, a vibrating block, a vibrating diaphragm and a voice coil, the permanent magnet is fixed inside the outer shell, the vibrating block is arranged inside the outer shell in a sliding mode, one end of the vibrating diaphragm is connected with the outer shell, the other end of the vibrating diaphragm is connected with the vibrating block, the voice coil is fixedly connected with the vibrating block through a connecting rod, and the connecting rod is connected with the connecting rod. The voice coil is arranged right opposite to the permanent magnet. The top surface and the bottom surface of the outer shell are respectively provided with four positioning grooves. Through the design of the dust collection unit, dust on the surface of the vibrating diaphragm can be automatically cleaned when the loudspeaker works, the dust collection pipe and the dust collection holes can absorb the dust generated when the vibrating diaphragm vibrates, the dust is collected through the bag body and the dust collection box, and the automatic cleaning function avoids the influence of dust accumulation on the vibration performance of the vibrating diaphragm.

Description

Technical Field

[0001] The present invention relates to the technical field of speakers, and particularly to a fully waterproof and airtight speaker. Background Art

[0002] A speaker is a device that converts an electrical signal into a sound signal and is widely used in fields such as audio systems, communication devices, and broadcast systems.

[0003] After retrieval, a Chinese patent with the publication number CN104811835B discloses a speaker module, which includes a module housing and a speaker unit. A module inner cavity for accommodating the speaker unit is formed inside the module housing. The module housing includes a module upper shell and a module lower shell. The module upper shell is disposed outside the front cover of the speaker unit, and a metal sheet is injection-molded on the module upper shell. The metal sheet leads out a grounding end for grounding connection with the application terminal of the speaker module. The speaker module proposed by the above solution is beneficial for thinning and can ensure the stability of the cooperation between the speaker and the application terminal. However, when the above solution is actually used, there are still the following deficiencies: Since the diaphragm of the speaker is always in an exposed state, dust in the air easily adheres to the surface of the diaphragm, which will cause a series of drawbacks. First of all, the accumulation of dust will directly affect the vibration performance of the diaphragm, resulting in sound distortion or reduced sound quality. The attachment of dust to the diaphragm will increase its mass and change its vibration characteristics. Especially in the high-frequency band, the tiny vibration of the diaphragm will be significantly disturbed, making the sound become turbid or unclear. Secondly, the long-term accumulation of dust may block the tiny pores or textures on the surface of the diaphragm, further affecting the sound wave propagation efficiency and reducing the sensitivity and sound pressure output of the speaker. In addition, dust may also enter the magnetic gap or voice coil area of the speaker, affecting the movement of the voice coil and even causing friction or jamming between the voice coil and the magnetic circuit system. In severe cases, it may damage the speaker. The speaker proposed by the above solution cannot solve this problem.

[0004] Therefore, it is necessary to design a fully waterproof and airtight speaker to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a fully waterproof and airtight speaker to solve the drawbacks existing in the prior art.

[0006] To achieve the above purpose, the present invention adopts the following technical scheme: A fully waterproof and airtight speaker, comprising a speaker unit, a dust suction unit, and a sealing unit; Among them, the speaker unit includes a housing, a permanent magnet, a vibration block, a diaphragm and a voice coil. The permanent magnet is fixed inside the housing. The vibration block is slidably arranged inside the housing. One end of the diaphragm is connected to the housing, and the other end is connected to the vibration block. The voice coil is fixedly connected to the vibration block through a connecting rod. The voice coil is arranged opposite to the permanent magnet. Four positioning grooves are provided on both the top surface and the bottom surface of the housing. Among them, the dust suction unit is composed of a dust suction structure, a bladder, two one-way flow-limiting structures and a dust collection box. The dust suction structure includes a dust suction pipe and a plurality of dust suction holes. The dust suction pipe is fixed on the housing, and a plurality of the dust suction holes are provided on the dust suction pipe. The bladder is fixed inside the housing. An opening is provided on the top surface of the bladder. The connecting rod passes through the opening and is fixed in the opening. The voice coil is arranged inside the bladder. The two one-way flow-limiting structures are both arranged on the bladder. The dust collection box is installed inside the housing. One of the one-way flow-limiting structures is communicated with the dust suction pipe through a connecting pipe, and the other one-way flow-limiting structure is communicated with the dust collection box through a connecting pipe. Among them, the sealing unit is composed of a sealing structure, an inflation structure and a positioning structure. The sealing unit is arranged on the side surface of the housing.

[0007] As a preferred technical solution of the present invention, the one-way flow-limiting structure includes an installation pipe, a bracket, an opening and a flow-limiting piece. The installation pipe is fixed on the bladder and is communicated with the bladder. The bracket is fixed inside the installation pipe. The opening is provided on the bracket. The flow-limiting piece is connected to the bracket through a first spring. The flow-limiting piece is arranged opposite to the opening.

[0008] As a preferred technical solution of the present invention, the sealing structure includes a sealing cover, four positioning rods, an adsorption plate and a sealing strip. The four positioning rods are respectively fixed at the four corners on the side surface of the sealing cover. The adsorption plate is fixed on one side of the sealing cover. The sealing strip is fixed on the other side of the sealing cover. Both the adsorption plate and the sealing strip are hollow structures. A plurality of negative pressure suction ports are provided on the side surface of the adsorption plate.

[0009] As a preferred technical solution of the present invention, the inflation structure includes an installation seat, a strip-shaped opening, a moving plate and two air bags. The installation seat is fixed on the side surface of the housing. The strip-shaped opening is provided on the side surface of the installation seat. The moving plate is slidably arranged inside the installation seat. The two air bags are both arranged inside the installation seat. One end of each of the two air bags is connected to the inner surface of the installation seat, and the other end of each of the two air bags is connected to the moving plate. One of the air bags is communicated with the adsorption plate through a pipeline, and the other air bag is communicated with the sealing strip through a pipeline.

[0010] As a preferred technical solution of the present invention, the positioning structure includes an outer cylinder, an inner rod, a sleeve plate and two pressing blocks. The outer cylinder is fixed to the side of the moving plate. The outer cylinder is slidably arranged in the strip-shaped opening. The inner rod is slidably arranged in the outer cylinder. One end of the inner rod extends to the outside of the outer cylinder. The sleeve plate is fixedly sleeved on the end of the inner rod located outside the outer cylinder. The sleeve plate and the mounting seat are connected by a second spring. The two pressing blocks are respectively fixed to both ends of the sleeve plate. Each pressing block is in contact with the side of the mounting seat.

[0011] As a preferred technical solution of the present invention, the inner surface of the outer cylinder and the outer surface of the inner rod are mutually fitted.

[0012] As a preferred technical solution of the present invention, the pressing block is made of rubber material.

[0013] As a preferred technical solution of the present invention, the shape of the sealing strip is adapted to the shape of the outer housing.

[0014] As a preferred technical solution of the present invention, a plurality of the dust suction holes are uniformly distributed on the dust suction pipe, and the dust suction pipe is arranged above the diaphragm.

[0015] As a preferred technical solution of the present invention, the dust collection box is detachably arranged on the outer housing.

[0016] The present invention has the following beneficial effects: 1. Through the design of the dust suction unit, it is possible to automatically clean the dust on the surface of the diaphragm when the speaker is working. The dust suction pipe and the dust suction holes can absorb the dust generated when the diaphragm vibrates, and collect the dust through the bladder and the dust collection box. This automatic cleaning function avoids the influence of dust accumulation on the vibration performance of the diaphragm, reduces the problems of sound distortion and deterioration of sound quality. Especially in the high-frequency band, it can significantly improve the clarity and fidelity of the sound. In addition, this design not only avoids the secondary pollution of the diaphragm by dust, but also reduces the risk of dust entering the magnetic gap or the voice coil area, preventing the voice coil from getting stuck or damaged, and further improving the reliability and durability of the speaker; 2. Through the design of the sealing unit, the speaker can be sealed by the sealing cover and the sealing strip when not in use, preventing moisture and dust from entering the interior of the speaker. After being inflated, the sealing strip can closely fit the inner wall of the outer housing, enhancing the waterproof performance of the speaker. This design is especially suitable for humid or dusty environments and extends the service life of the speaker; 3. Through the design of the adsorption plate and the negative pressure suction port on the sealing cover, the speaker can be firmly adsorbed on a flat surface, such as a desktop, when in use. This adsorption and fixing function avoids the movement of the speaker due to vibration or external force during use, improving the stability and safety of use; 4. By pulling the sleeve plate to separate the pressing block from the mounting seat, users can easily adjust the position of the moving plate. The operation is simple and flexible. After the moving plate moves to the appropriate position, release the sleeve plate, and the second spring will reset the pressing block and press it against the mounting seat, generating a large frictional force to firmly fix the position of the moving plate and prevent it from moving under non-human circumstances, ensuring the stability and reliability of the structure. Secondly, the design of the outer cylinder and the inner rod provides a limiting function for the movement of the sleeve plate, further enhancing the control accuracy of the moving plate and preventing it from shifting or shaking. This design not only improves the convenience of user operation but also enhances the durability and stability of the overall structure, especially suitable for scenarios that require frequent adjustment or long-term fixed positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of the fully waterproof and airtight speaker proposed by the present invention; Figure 2 FIG. is an exploded structural diagram of the outer shell and the sealing cover; Figure 3 FIG. is a cross-sectional structural diagram of the fully waterproof and airtight speaker proposed by the present invention; Figure 4 FIG. is a cross-sectional structural diagram of the fully waterproof and airtight speaker from another perspective proposed by the present invention; Figure 5 FIG. is a cross-sectional structural diagram of the fully waterproof and airtight speaker from yet another perspective proposed by the present invention; Figure 6 FIG. is a structural diagram when the sealing cover is installed on the bottom surface of the outer shell; Figure 7 FIG. is a structural diagram of the inflation structure and the positioning structure; Figure 8 FIG. is a structural diagram of the inflation structure; Figure 9 FIG. is a cross-sectional structural diagram of the mounting seat; Figure 10 FIG. is a structural diagram of the bracket, current-limiting piece, and the first spring; Figure 11 FIG. is Figure 3 an enlarged view of the structure at location A of Figure 12 FIG. is Figure 3 an enlarged view of the structure at location B of

[0018] In the figure: 11, outer housing; 12, permanent magnet; 13, vibration block; 14, diaphragm; 15, voice coil; 16, connecting rod; 17, positioning groove; 21, dust suction pipe; 22, dust suction hole; 31, bladder; 32, mounting pipe; 33, bracket; 34, opening; 35, current limiting piece; 36, first spring; 37, connecting pipe; 38, dust collection box; 41, sealing cover; 42, positioning rod; 43, adsorption plate; 44, negative pressure suction port; 45, sealing strip; 51, mounting seat; 52, strip-shaped opening; 53, moving plate; 54, airbag; 61, outer cylinder body; 62, inner rod body; 63, sleeve plate; 64, second spring; 65, pressing block. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] Referring to Figures 1-12 , a fully waterproof and airtight loudspeaker, including a loudspeaker unit, a dust suction unit and a sealing unit. The loudspeaker unit includes an outer housing 11, a permanent magnet 12, a vibration block 13, a diaphragm 14 and a voice coil 15. The permanent magnet 12 is fixed inside the outer housing 11. The vibration block 13 is slidably arranged inside the outer housing 11. One end of the diaphragm 14 is connected to the outer housing 11, and the other end is connected to the vibration block 13. The voice coil 15 and the vibration block 13 are fixedly connected through a connecting rod 16. The voice coil 15 is arranged opposite to the permanent magnet 12. Four positioning grooves 17 are opened on both the top surface and the bottom surface of the outer housing 11. The sound signal enters the voice coil 15 in the form of an electric current. When the audio current passes through the voice coil 15, the voice coil 15 is forced to vibrate in the magnetic field, driving the connected diaphragm 14 to vibrate. The vibration of the diaphragm 14 pushes the surrounding air to generate sound waves, thereby emitting sound; The dust suction unit consists of a dust suction structure, a bladder 31, two one-way flow-limiting structures and a dust collection box 38. The dust suction structure includes a dust suction pipe 21 and a number of dust suction holes 22. The dust suction pipe 21 is fixed on the outer housing 11, and a number of dust suction holes 22 are all opened on the dust suction pipe 21. The number of dust suction holes 22 are evenly distributed on the dust suction pipe 21. The dust suction pipe 21 is arranged above the diaphragm. The bladder 31 is fixed inside the outer housing 11. An opening is provided on the top surface of the bladder 31. The connecting rod 16 passes through the opening and is fixed within the opening. The voice coil 15 is arranged inside the bladder 31. The two one-way flow-limiting structures are both provided on the bladder 31. The dust collection box 38 is installed inside the outer housing 11. One of the one-way flow-limiting structures is connected to the dust suction pipe 21 through a connecting pipe 37, and the other one-way flow-limiting structure is connected to the dust collection box 38 through a connecting pipe 37. The dust collection box 38 is detachably arranged on the outer housing 11. The one-way flow-limiting structure includes an installation pipe 32, a bracket 33, an opening 34 and a flow-limiting sheet 35. The installation pipe 32 is fixed on the bladder 31 and is in communication with the bladder 31. The bracket 33 is fixed inside the installation pipe 32. The opening 34 is opened on the bracket 33. The flow-limiting sheet 35 is connected to the bracket 33 through a first spring 36. The flow-limiting sheet 35 is arranged opposite to the opening 34. When the bladder 31 performs a suction action, a number of dust suction holes 22 on the dust suction pipe 21 can absorb the dust generated when the diaphragm 14 vibrates, and the bladder 31 sucks the dust into the interior of the bladder 31. When the bladder 31 performs an exhaust action, the gas and dust inside the bladder 31 are pressed into the dust collection box 38, realizing the automatic collection of the dust on the diaphragm 14. Based on the above process, when the diaphragm 14 vibrates, the dust attached to the diaphragm 14 will be lifted up and absorbed by the dust suction holes 22, and finally discharged into the interior of the dust collection box 38. This special structural design can play a role in automatically collecting the dust on the surface of the speaker diaphragm 14; The sealing unit consists of a sealing structure, an inflation structure and a positioning structure. The sealing unit is arranged on the side of the outer housing 11. The sealing structure includes a sealing cover 41, four positioning rods 42, an adsorption plate 43 and a sealing strip 45. The four positioning rods 42 are respectively fixed at the four corners on the side of the sealing cover 41. The adsorption plate 43 is fixed on one side of the sealing cover 41. The sealing strip 45 is fixed on the other side of the sealing cover 41. The shape of the sealing strip 45 is adapted to the shape of the outer housing 11. Both the adsorption plate 43 and the sealing strip 45 are hollow structures. A number of negative pressure suction ports 44 are opened on the side of the adsorption plate 43. When the speaker is not in use, the user can cover the sealing cover 41 on the top of the outer housing 11. This design can improve the overall waterproof and sealing performance of the speaker, which is beneficial to the actual use of the speaker; The inflatable structure includes a mounting seat 51, a strip-shaped opening 52, a moving plate 53 and two air bags 54. The mounting seat 51 is fixed to the side surface of the outer housing 11. The strip-shaped opening 52 is formed in the side surface of the mounting seat 51. The moving plate 53 is slidably arranged inside the mounting seat 51. The two air bags 54 are both arranged inside the mounting seat 51. One end of each of the two air bags 54 is connected to the inner surface of the mounting seat 51, and the other end of each of the two air bags 54 is connected to the moving plate 53. One of the air bags 54 is communicated with the adsorption plate 43 through a pipeline, and the other air bag 54 is communicated with the sealing strip 45 through a pipeline. The positioning structure includes an outer cylinder 61, an inner rod 62, a sleeve plate 63 and two pressing blocks 65. The outer cylinder 61 is fixed to the side surface of the moving plate 53. The outer cylinder 61 is slidably arranged in the strip-shaped opening 52. The inner rod 62 is slidably arranged inside the outer cylinder 61. The inner surface of the outer cylinder 61 is in mutual contact with the outer surface of the inner rod 62. One end of the inner rod 62 extends to the outside of the outer cylinder 61. The sleeve plate 63 is fixedly sleeved on one end of the inner rod 62 located outside the outer cylinder 61. The sleeve plate 63 is connected to the mounting seat 51 through a second spring 64. The two pressing blocks 65 are respectively fixed to both ends of the sleeve plate 63. Each pressing block 65 is in contact with the side surface of the mounting seat 51. The pressing block 65 is made of rubber material. Before the user moves the moving plate 53, first pull the sleeve plate 63 to move the sleeve plate 63 away from the mounting seat 51. In this process, the two pressing blocks 65 move accordingly, and the sleeve plate 63 stretches the second spring 64. When the two pressing blocks 65 are separated from the mounting seat 51, the user can freely pull the moving plate 53 to move. After moving the moving plate 53 to a suitable position, the user releases the sleeve plate 63 to make the sleeve plate 63 reset under the action of the second spring 64. When the sleeve plate 63 resets, the two pressing blocks 65 will press the mounting seat 51 under the action of the second spring 64, which makes a large frictional force generated between the two pressing blocks 65 and the mounting seat 51. This frictional force can fix the position of the moving plate 53.

[0021] The specific working principle of the present invention is as follows: When the fully waterproof and airtight speaker proposed by the present invention is in use, sound signals enter the voice coil 15 in the form of current. When the audio current passes through the voice coil 15, the voice coil 15 is forced to vibrate in the magnetic field, driving the connected diaphragm 14 to vibrate. The vibration of the diaphragm 14 pushes the surrounding air to generate sound waves, thereby emitting sound. When the voice coil 15 moves away from the permanent magnet 12, the voice coil 15 will pull the bladder 31, deforming the bladder 31. During this process, the internal space of the bladder 31 will increase. When the voice coil 15 moves towards the permanent magnet 12, the voice coil 15 will squeeze the bladder 31, deforming the bladder 31. During this process, the internal space of the bladder 31 will decrease. Therefore, during the movement of the voice coil 15, the bladder 31 will be continuously stretched and compressed. Two one-way current-limiting structures are connected to the bladder 31. One one-way current-limiting structure restricts the gas to only enter the bladder 31, and the other one-way current-limiting structure restricts the gas to only flow out of the bladder 31. When the internal space of the bladder 31 becomes larger, under the action of negative pressure, the bladder 31 will perform an air extraction action through the corresponding one-way current-limiting structure. When the internal space of the bladder 31 decreases, the air inside the bladder 31 will be pressed out through the corresponding one-way current-limiting structure, that is, an exhaust action. When the bladder 31 performs an air intake action, several dust suction holes 22 on the dust suction pipe 21 can absorb the dust generated when the diaphragm 14 vibrates, and the bladder 31 sucks the dust into the inside of the bladder 31. When the bladder 31 performs an exhaust action, the gas and dust inside the bladder 31 will be pressed into the dust collection box 38, realizing the automatic collection of dust on the diaphragm 14. Based on the above process, when the diaphragm 14 vibrates, the dust attached to the diaphragm 14 will be lifted up, absorbed by the dust suction holes 22, and finally discharged into the inside of the dust collection box 38. This special structural design can automatically collect the dust on the surface of the speaker diaphragm 14; Such as Figure 3As shown in the figure, for the two one-way current-limiting structures, the current-limiting piece 35 in one of the one-way current-limiting structures (hereinafter referred to as current-limiting piece 35A for the convenience of understanding and description) can only move towards the inside of the airbag 31, and the current-limiting piece 35 in the other one-way current-limiting structure (hereinafter referred to as current-limiting piece 35B for the convenience of understanding and description) can only move away from the airbag 31. When the internal space of the airbag 31 becomes larger, the gas will push the current-limiting piece 35A, causing the current-limiting piece 35A to compress the corresponding first spring 36. At this time, the current-limiting piece 35A no longer blocks the corresponding opening 34, and the gas can enter the inside of the airbag 31 through this opening 34. When the internal space of the airbag 31 becomes smaller, the gas inside the airbag 31 will push the current-limiting piece 35B, causing the current-limiting piece 35B to move away from the airbag 31. At this time, the current-limiting piece 35B compresses the corresponding first spring 36 and no longer blocks the corresponding opening 34, and the gas inside the airbag 31 can flow out through this opening 34. Under the combined action of the two one-way current-limiting structures, during the sound generation process of the speaker, the airbag 31 can continuously perform the actions of air extraction and exhaust, so as to realize the automatic collection of dust; A sealing cover 41 is also provided on the speaker proposed by the present invention. When the speaker is not in use, the user can cover the sealing cover 41 on the top of the outer housing 11. The four positioning rods 42 on the sealing cover 41 will respectively insert into the four positioning grooves 17 on the top surface of the outer frame body, which plays a role in positioning the covering between the outer frame body and the sealing cover 41. When the sealing cover 41 is covered on the outer frame body, the sealing strip 45 on the sealing cover 41 is exactly located inside the outer frame body and contacts the inner surface of the outer frame body. Further, the user can pull the sleeve plate 63, so that the sleeve plate 63 drives the moving plate 53 to move towards one end of the mounting seat 51. When the moving plate 53 moves, it will squeeze one of the airbags 54 and stretch the other airbag 54 at the same time. For the squeezed airbag 54, the gas inside the airbag 54 will enter the inside of the sealing strip 45, causing the sealing strip 45 to inflate and expand. When the sealing strip 45 expands, it can press tightly against the inner surface of the outer frame body, thereby improving the sealing performance between the sealing cover 41 and the outer frame body. This design can improve the overall waterproof sealing performance of the speaker, which is beneficial to the actual use of the speaker; When the user uses the speaker, the speaker can also be adsorbed and fixed by the sealing cover 41. Specifically, when the speaker needs to be used, the user first controls the position of the moving plate 53 to move the moving plate 53 to the middle position of the mounting seat 51. Then, the sealing cover 41 is removed from the outer frame body, and the sealing cover 41 is buckled on the bottom surface of the outer frame body. In this process, the user can also insert the four positioning rods 42 on the sealing cover 41 into the four positioning grooves 17 on the bottom surface of the outer frame body respectively, so as to improve the stability of the sealing cover 41 on the bottom surface of the outer frame body. Further, the user places the speaker on a flat surface, such as a desktop, and then pulls the sleeve plate 63 in another direction. When the sleeve plate 63 moves, it can drive the moving plate 53 to move through the outer cylinder body 61 and the inner rod body 62, so that the moving plate 53 moves towards the other end of the mounting seat 51. When the moving plate 53 moves, it can also squeeze one of the air bags 54 and stretch the other air bag 54 at the same time. In this process, the air bag 54 that is first squeezed will be stretched, and the air bag 54 that is first stretched will be squeezed. The stretched air bag 54 can extract the air inside the adsorption plate 43, so that a number of negative pressure suction ports 44 can be adsorbed on the flat surface under the action of negative pressure. This design can ensure the stability of the speaker on the flat surface and prevent the speaker from being displaced easily during use; In order to ensure the stability of the moving plate 53 inside the mounting seat 51, the present invention designs a pressing structure. For the pressing structure, before the user moves the moving plate 53, the sleeve plate 63 is first pulled to move the sleeve plate 63 away from the mounting seat 51. In this process, the two pressing blocks 65 move accordingly, and the sleeve plate 63 stretches the second spring 64. When the two pressing blocks 65 are separated from the mounting seat 51, the user can freely pull the moving plate 53 to move. After moving the moving plate 53 to a suitable position, the user releases the sleeve plate 63, so that the sleeve plate 63 is reset under the action of the second spring 64. When the sleeve plate 63 is reset, the two pressing blocks 65 will press the mounting seat 51 under the action of the second spring 64, which makes a large frictional force generated between the two pressing blocks 65 and the mounting seat 51. This frictional force can fix the position of the moving plate 53 and prevent the moving plate 53 from moving under non-human conditions. In addition, when the sleeve plate 63 moves, the inner rod body 62 slides inside the outer cylinder body 61, and the setting of the outer cylinder body 61 and the inner rod body 62 plays a role in limiting the movement of the sleeve plate 63.

[0022] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. Fully waterproof and sealed speaker, characterized by: It includes a speaker unit, a dust collecting unit and a sealing unit; The loudspeaker unit comprises an outer shell (11), a permanent magnet (12), a vibration block (13), a diaphragm (14) and a voice coil (15); the permanent magnet (12) is fixed inside the outer shell (11); the vibration block (13) is slidably arranged inside the outer shell (11); one end of the diaphragm (14) is connected to the outer shell (11) and the other end is connected to the vibration block (13); the voice coil (15) and the vibration block (13) are fixedly connected via a connecting rod (16); the voice coil (15) is arranged opposite to the permanent magnet (12); and four positioning grooves (17) are provided on the top surface and the bottom surface of the outer shell (11); The dust suction unit is composed of a dust suction structure, a capsule (31), two one-way flow limiting structures and a dust collecting box (38); the dust suction structure comprises a dust suction pipe (21) and a plurality of dust suction holes (22); the dust suction pipe (21) is fixed on the outer shell (11); the plurality of dust suction holes (22) are all provided on the dust suction pipe (21); the capsule (31) is fixed inside the outer shell (11); a through opening is provided on the top surface of the capsule (31); the connecting rod (16) passes through the through opening and is fixed in the through opening; the voice coil (15) is arranged inside the capsule (31); the two one-way flow limiting structures are both provided on the capsule (31); the dust collecting box (38) is installed inside the outer shell (11); one of the one-way flow limiting structures is connected to the dust suction pipe (21) via a connecting pipe (37); and the other one-way flow limiting structure is connected to the dust collecting box (38) via a connecting pipe (37); The sealing unit is composed of a sealing structure, an inflation structure and a positioning structure, and the sealing unit is arranged on a side of the outer shell (11).

2. The fully waterproof sealed speaker according to claim 1, characterized in that: The one-way flow-limiting structure comprises a mounting tube (32), a bracket (33), an opening (34) and a flow-limiting sheet (35); the mounting tube (32) is fixed on the capsule (31), and the mounting tube (32) and the capsule (31) are in communication; the bracket (33) is fixed inside the mounting tube (32); the opening (34) is provided on the bracket (33); the flow-limiting sheet (35) and the bracket (33) are connected via a first spring (36); and the flow-limiting sheet (35) is arranged opposite to the opening (34).

3. The fully waterproof sealed speaker according to claim 1, characterized in that: The sealing structure comprises a sealing cover (41), four positioning rods (42), an adsorption plate (43) and a sealing strip (45); the four positioning rods (42) are respectively fixed at the four corners of the side of the sealing cover (41); the adsorption plate (43) is fixed at one side of the sealing cover (41); the sealing strip (45) is fixed at the other side of the sealing cover (41); the adsorption plate (43) and the sealing strip (45) are both hollow structures; a plurality of negative pressure suction ports (44) are provided on the side of the adsorption plate (43).

4. The fully waterproof sealed speaker according to claim 3, characterized in that: The inflatable structure comprises a mounting seat (51), a strip-shaped opening (52), a movable plate (53) and two airbags (54); the mounting seat (51) is fixed to a side surface of the outer shell (11); the strip-shaped opening (52) is opened on the side surface of the mounting seat (51); the movable plate (53) is slidably arranged inside the mounting seat (51); the two airbags (54) are arranged inside the mounting seat (51); one end of the two airbags (54) is connected to the inner surface of the mounting seat (51); the other ends of the two airbags (54) are connected to the movable plate (53); one of the airbags (54) is connected to the adsorption plate (43) via a pipeline; and the other airbag (54) is connected to the sealing strip (45) via a pipeline.

5. The fully waterproof sealed speaker according to claim 4, characterized in that: The positioning structure comprises an outer cylinder (61), an inner rod (62), a sleeve plate (63) and two pressing blocks (65); the outer cylinder (61) is fixed to the side of the movable plate (53); the outer cylinder (61) is slidably arranged in the strip-shaped opening (52); the inner rod (62) is slidably arranged in the outer cylinder (61); one end of the inner rod (62) extends to the outside of the outer cylinder (61); the sleeve plate (63) is fixedly sleeved on one end of the inner rod (62) located outside the outer cylinder (61); the sleeve plate (63) is connected to the mounting seat (51) via a second spring (64); the two pressing blocks (65) are respectively fixed to the two ends of the sleeve plate (63); and each of the pressing blocks (65) is in contact with the side of the mounting seat (51).

6. The fully waterproof sealed speaker according to claim 5, characterized in that: The inner surface of the outer cylinder (61) and the outer surface of the inner rod (62) are in contact with each other.

7. The fully waterproof sealed speaker according to claim 5, characterized in that: The pressing block (65) is made of rubber material.

8. The fully waterproof sealed speaker according to claim 4, characterized in that: The shape of the sealing strip (45) is adapted to the shape of the outer shell (11).

9. The fully waterproof sealed speaker according to claim 1, characterized in that: The plurality of dust suction holes (22) are evenly distributed on the dust suction pipe (21), and the dust suction pipe (21) is arranged above the diaphragm.

10. The fully waterproof sealed speaker according to claim 1, characterized in that: The dust collection box (38) is detachably arranged on the outer shell (11).

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